factory_Finalize will first check if there is a physical dev switch through crossystem vdat_flags. The task check_developer_switch will only be added to queue if there is a physical dev switch.

BUG=chrome-os-partner:14066 TEST=Run finalize test on snow, link, there will be no check_developer_switch task. Run finalize test on lumpy, there will be check_developer_switch task.

Lumpy here is the Samsung S5 550 Chromebook and Snow is an upcoming Chrome OS device. So, Snow will not have a physical dev switch. Will it include an option to enable dev mode from settings menu? May be, we can not be 100% sure at this point. Will all future Chrome OS devices come without dev switch? That is not sure as well.